229 research outputs found

    New 60-cm Radio Survey Telescope with the Sideband-Separating SIS Receiver for the 200 GHz Band

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    We have upgraded the 60-cm radio survey telescope located in Nobeyama, Japan. We developed a new waveguide-type sideband-separating SIS mixer for the telescope, which enables the simultaneous detection of distinct molecular emission lines both in the upper and lower sidebands. Over the RF frequency range of 205-240 GHz, the single-sideband receiver noise temperatures of the new mixer are 40-100 K for the 4.0-8.0 GHz IF frequency band. The image rejection ratios are greater than 10 dB over the same range. For the dual IF signals obtained by the receiver, we have developed two sets of acousto-optical spectrometers and a telescope control system. Using the new telescope system, we successfully detected the 12CO (J=2-1) and 13CO (J=2-1) emission lines simultaneously toward Orion KL in 2005 March. Using the waveguide-type sideband-separating SIS mixer for the 200 GHz band, we have initiated the first simultaneous 12CO (J=2-1) and 13CO (J=2-1) survey of the galactic plane as well as large-scale mapping observations of nearby molecular clouds.Comment: 15 pages, 15 figures, Accepted for publication in PASJ, version with high resolution figures is available via http://www.nro.nao.ac.jp/~nakajima/vst1_2sb.pd

    Squamous cell carcinoma in an esophageal diverticulum below the aortic arch

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    AbstractINTRODUCTIONEsophageal diverticula frequently arise from pharyngoesophageal transition area, tracheal bifurcation and epiphrenic region. Carcinoma arising from esophageal diverticulum is rarely seen. We report a patient with a squamous cell carcinoma arising within an esophageal diverticulum below the aortic arch.PRESENTATION OF CASEA 70-year-old man was diagnosed to have a squamous cell carcinoma of the vocal cord with enlarged lymph nodes in the neck, as well as a squamous cell carcinoma arising within an esophageal diverticulum below the aortic arch. There have been no reported cases of esophageal cancer arising from a diverticulum below the aortic arch. Preoperative radiotherapy for the esophageal cancer and pharyngeal cancer was given, followed by surgery. The excised specimen of the esophageal diverticulum and its external appearance revealed that it lacked muscle fibers, with a type 0-IIa lesion arising from the diverticulum. Microscopic examination showed three lymph nodes at the superior mediastinum were positive for malignancy. Bilateral pleural dissemination was detected 7 months after esophagectomy.DISCUSSIONCancer arising from an esophageal diverticulum is mainly found at an advanced stage because of delayed diagnosis. The absence of muscularis propia may lead to early invasion. Thus, cancers within an esophageal diverticulum are considered to be at a more advanced stage than similar cancers arising elsewhere.CONCLUSIONFor detecting of cancer arising from an esophageal diverticulum, a high index of awareness is important. Delay in diagnosis makes surgical management difficult

    The AMANOGAWA-2SB Galactic Plane Survey I: Data on the Galactic Equator

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    Using a waveguide-type sideband-separating receiver (2SB receiver) on the Tokyo-NRO 60-cm telescope (renamed the AMANOGAWA telescope), we carried out simultaneous observations in the 12CO(J = 2-1) and 13CO(J = 2-1) lines over the Galactic plane l = 10-245 deg along b = 0 deg with a 3.75 arcmin grid. Using the 12CO(J = 1-0) data of Dame et al. (2001), who used a beam size almost the same as ours, we show 12CO(J = 2-1)/12CO(J = 1-0) and 13CO(J = 2-1)/12CO(J = 2-1) intensity ratios on the l-v map and the intensity correlations among the three lines. As a result, a linear correlation between 12CO(J = 1-0) and 12CO(J = 2-1) and a curve correlation between 12CO(J = 2-1) and 13CO(J = 2-1), as produced by most of the data, are found. We investigate these correlations with simple radiative transfer equations to ascertain a number of restrictions on the physical quantities of molecular gas on a galactic scale.Comment: 22 pages, 13 figures, accepted for publication in PAS

    Mood Stabilizers and Antipsychotics for Acute Mania: Systematic Review and Meta-Analysis of Augmentation Therapy vs Monotherapy From the Perspective of Time to the Onset of Treatment Effects

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    Background: Existing meta-analytic evidence on bipolar mania treatment has revealed that augmentation therapy (AUG) with antipsychotics and mood stabilizers is more effective than monotherapy. However, the speed of the onset of treatment effects and subsequent changes in risk/benefit are unclear. Methods: We searched the Cochrane CENTRAL, MEDLINE, and EMBASE databases until January 2021. Our primary outcomes were response and tolerability. We set 3 time points: 1, 3, and 6 weeks after randomization. Results: Seventeen studies compared AUG therapy and MS monotherapy (comparison 1), and 8 studies compared AUG therapy and antipsychotics monotherapy (comparison 2). In comparison 1, AUG therapy resulted in significantly more responses than monotherapy, with an odds ratio of 1.45 (95% confidence interval [CI]: 1.17 to 1.80) at 3 weeks and 1.59 (95% CI: 1.28 to 1.99) at 6 weeks. Significant improvement was observed in the first week with a standardized mean difference of −0.25 (95% CI: −0.38 to −0.12). In comparison 2, AUG therapy was significantly more effective than monotherapy, with an odds ratio of 1.73 (95% CI: 1.25 to 2.40) at 3 weeks and 1.74 (95% CI: 1.11 to 2.73) at 6 weeks. Significant improvement was observed in the first week with an standardized mean difference of −0.23 (95% CI: −0.39 to −0.07). Regarding tolerability, there was no significant difference between AUG therapy and monotherapy at 3 and 6 weeks in both comparisons. Conclusions: Early AUG therapy should be considered, as it has shown efficacy from weeks 1 to 6, although attention to side effects is necessary for acute mania treatment

    Long-term prognosis of diabetic patients with acute myocardial infarction in the era of acute revascularization

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    Abstract Background The long-term prognosis of diabetic patients with acute myocardial infarction (AMI) treated by acute revascularization is uncertain, and the optimal pharmacotherapy for such cases has not been fully evaluated. Methods To elucidate the long-term prognosis and prognostic factors in diabetic patients with AMI, a prospective, cohort study involving 3021 consecutive AMI patients was conducted. All patients discharged alive from hospital were followed to monitor their prognosis every year. The primary endpoint of the study was all-cause mortality, and the secondary endpoint was the occurrence of major cardiovascular events. To elucidate the effect of various factors on the long-term prognosis of AMI patients with diabetes, the patients were divided into two groups matched by propensity scores and analyzed retrospectively. Results Diabetes was diagnosed in 1102 patients (36.5%). During the index hospitalization, coronary angioplasty and coronary thrombolysis were performed in 58.1% and 16.3% of patients, respectively. In-hospital mortality of diabetic patients with AMI was comparable to that of non-diabetic AMI patients (9.2% and 9.3%, respectively). In total, 2736 patients (90.6%) were discharged alive and followed for a median of 4.2 years (follow-up rate, 96.0%). The long-term survival rate was worse in the diabetic group than in the non-diabetic group, but not significantly different (hazard ratio, 1.20 [0.97-1.49], p = 0.09). On the other hand, AMI patients with diabetes showed a significantly higher incidence of cardiovascular events than the non-diabetic group (1.40 [1.20-1.64], p Conclusions Although diabetic patients with AMI have more frequent adverse events than non-diabetic patients with AMI, the present results suggest that acute revascularization and standard therapy with aspirin and RAS inhibitors may improve their prognosis.</p